Here is everything that "is" avalaible

The Train does not run during the party, Tom Sawyer Island and the Tree House are closed, but pretty much everything else is avalaible.
Parades/Shows
Mickey's Very Merry Christmas Parade (parade route) -- 8:15pm & 10:45pm
Twas the Night Before Christmas (Galaxy Palace Theater) -- 6:15pm, 7:15pm, 8:15pm, 9:30pm, 10:30pm
Celebrate the Season (Castle Forecourt Stage) -- 7:00pm, 9:40pm, 12:00am
Wishes Fireworks with Perimeter fireworks -- 9:15pm
Storytelling
Belle's Enchanted Christmas (Fairy Tale Garden) -- 6:40pm, 7:30pm 8:20pm, 10:10pm, 11:10pm
Atmosphere Groups
Christmas Brass (in front of Speedway) -- 6:45-7:05pm
Brass Quintet (Carousel) -- 6:50pm-7:15pm
Fanfare Trumpets (Train Station-Mickey floral side) -- 7:05-7:15pm
Main Street Philharmonic (Castle Stage) -- 6:45-7:00pm
Banjo Brothers and Bob (strolling-Frontierland) -- 7:30, 8:45, 10:00, 11:25pm
The Tropicals (Caribbean Plaza) -- 7:30, 8:30, 9:30, 10:30, 11:30pm
Dickens Carolers (Liberty Bell) -- 7:30, 8:55, 9:45, 10:25, 11:45pm
Lake Howell Holiday Brass (Tomorrowland) -- 6:45, 7:45, 8:45pm
Character Meet & Greets
Santa (Town Square) 7pm-12am
Mickey's Very Merry Holiday Hop -- Dance Party with characters in
Fantasyland Grotto -- 7pm-12am
Donald Duck (Fantasyland Stroller Park) -- 7pm - 12am
"Good Night" Mickey (Train Station Balcony-floral) -- after the second parade
Select characters will be available at various times throughout the park.
Photo Locations
Adventureland Veranda
Timekeeper Theater
Timekeeper Pre-Show
Holiday Cookie and Cocoa Locations
Diamond Horseshoe
Plaza Pavilion
Columbia Harbor House
Attractions Available
Fantasyland -- Cinderella's Golden Carrousel, Dumbo the Flying Elephant, Mad Tea Party, Winnie the Pooh, Peter Pan's Flight, Snow White's Scary Adventures, Mickey's PhilharMagic
Adventureland -- Aladdin, Pirates of the Caribbean
Frontierland -- Splash Mountain, Country Bear Jamboree, Big Thunder Mountain Railroad
Tomorrowland -- Astro Orbiter, Buzz Lightyear's Space Ranger Spin, Space Mountain, Tomorrowland Transit Authority, Tomorrowland Arcade, Tomorrowland Indy Speedway, Stitch's Great Escape!
Liberty Square -- The Haunted Mansion, Liberty Belle Riverboat
Merchandise / Services / Food & Beverage Offerings
Fantasyland -- Mrs. Pott's Cupboard, Pooh's Thotful Shop, Sir Mickey's, Seven Dwarf's Mine, Fantasy Faire
Adventureland -- Agrabah Bazaar, Pirates Bazaar
Frontierland -- Pecos Bill Cafe, Westward Ho, Big Al's Splash Photo
Tomorrowland -- Cosmic Ray's Starlight Cafe, The Lunching Pad, Auntie Gravities, Mickey's Star Traders, Space Mountain Shop, Merchant of Venus, Buzz Imaging
Main Street, U.S.A. -- Casey's Corner, Main Street Sweets, Tony's Restaurant, Strollers (open until 9pm), Confectionery, Tipboard Cart, Station Break (lockers), The Chapeau, Main Street Toy Store, Emporium, Main Street Cinema, Uptown Jewelers, Baby Care, Exposition Hall, Newsstand (open till 9pm)
Liberty Square -- Liberty Tree Tavern, Sleepy Hollow, Ye Olde Christmas Shop